The username and password of the Tomcat server management interface are missing.

Tomcat server http: // localhost: 8080/
In this way, you need to enter the user name and password after clicking the manager app to enter the management application interface.
I forgot my username and password.
Solution:
Go to the Apache-Tomcat-7.0.53 \ conf directory
Open this file tomcat-users.xml
Configure as follows:

Before the </tomcat-users> node

<Role rolename = "Manager-Gui"/> <User Username = "admin" Password = "admin" roles = "Manager-Gui"/>

Save the configuration and restart the Tomcat server.
Access http: // localhost: 8080/
Click the manager app and enter the User Name Admin and password admin to go to the management application page.